Dispensing apparatus.



No. 730.989. PATENTED JUNE 16, 1903. D. B. DE WALTOFF.

DISPENSING APPARATUS.

APPLICATION rum) 00m. 30, 1902. no MODEL. 2 SHEETSSHBET 1,

n4: Ncvame. :TEF" :0, wcTo-u'mo, WASHINGTON. n. c.

UNITED STATES iatented June 16, 1903.

DAYVE BORIS DE WALTOFF, OF NEW YORK, N. Y.

DISPENSING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 730,989, dated June 16,1903. Ap licant filed October so, 1902. swarm. 129.453. (No model.)

To (all whom, it may concern.-

Be it known that I, DAYVE BORIS DE WAL- TOFF, of the borough ofBrooklyn, city and State of New York, have invented a certain new anduseful Improvement in Dispensing Apparatus, of which the following is aspecification.

The present invention relates to an apparatus for delivering determinateor measured quantities of fluid bodies, and is especially designed forembodiment in a dispensing device or apparatus for successivelydischarging by repeated operations definite predetermined quantities ofliquid from a reservoir or container.

It is a particular object of the invention to furnish a satisfactoryworking apparatus of this character simple in construction and effectiveat each movement of the discharging device to eject from the reservoir apredetermined quantity of the contained liquid.

An apparatus embodying my presentimprovements is susceptible as oneinstance of its application to the dispensing or measuring out ofpredetermined quantities of liquid or liquefied drugs, toiletpreparations, and the like and which it is desired to Withdraw in smallquantities from time to time. Such an embodiment is set forth in theaccompanying drawings, in which Figure 1 is a front elevation of theapparatus, showing one meansof securing the reservoir orcontaining'vessel in position to have its contentsdischarged a portionat a time.

Fig; 2 is a plan view of the parts illustrated in Fig. 1. Fig. 3 is. alongitudinal section through the discharging device attached to thereservoir, the figure being drawn upon a somewhat larger scale than thepreceding figures; and Fig. 4 is a similar section through a dispensingapparatus of modified construc- For instance, as to its form-the vesselbe in the shape of a jar, as indicated in Figs. 1 and 2, in which thereservoir is designated by B, or the containing vessel for holding theliquid maybe cylindrical in form and provided with a hemisphericalbottom. (See the vessel B in Fig. 4.) The material from which the vesselis made may also be of various sortsfor instance, glass, metal, &c.Whatever its form and the material from which it is made the vessel willordinarily be provided witha cover, such as b or b in the mentionedfigures, preferably detachably connected with the vessel in someconvenient and appropriate Way. An opening or openings to the interiorwill also be provided to permit the pressure of air to assist in theegress of the liquid through the operation of the discharging device,now to be described, while various means may be employed for holding thevessel in position, holding-straps 19 being in this case indicated as aninstance of such means. This discharging device may be said in a generalWay to comprise acylinder and piston movable relatively to each otherwhen force is applied by the operator to actuate the device, the normalor retracted position of the one relatively to the other being assuredby a return'ing-sprin g. The inlet to the cylinder-space from theinterior of the vessel is controlled by an inwardly-opening butoutwardlyclosing valve,-(with reference to the former space,) while thedischarge from the cylinder (occurring during the forcible contractionof the volume thereof) takes place through an outwardly-opening butinwardly-closing valve.

Referring now in, detail to that form of the apparatus disclosed inFigs. 1 to 3, inclusive, there is here comprised a fixed cylinder 2,secured to the containing vessel. In the form of apparatus illustratedthe cylinder is secured to the exterior'of the vessel, a threadedtubular stem 2 on thecylinder passing through an opening in the side ofthe vessel, within which latter aclamping-nut 2 engages with the threadon the stem to firmly hold the cylinder in place. Within thecylinder isadapted to slide a piston, such as 3, between which and the bottomof thecylinder is inserted a coiled spring 4, urging the piston to its extremeoutward position. In

this construction therefore the piston is movable relatively to thecylinder, and for conveniently moving it inwardly against the force ofthe spring 4 to thereby diminish the space between it and the bottom ofthe cylinder and discharge the liquid in the cylinder a push-button orknob 5 is provided. The movement of the liquid back into the vesselafter the same has flowed outward therefrom to fill the space behind theretreating piston (upon its release and as it is thrust outward by theaction of the spring l) is prevented by an outwardly-closing valve, suchas b, adaptto seat itself against a seat provided for it at the bottomof the cylinder. The seating of this valve is assured by a spring 7,interposed between the valve and the piston, but whose tension isiusufficient to prevent the inflow of liquid through the central passage2 in the stem 2 under the suction of the released and retreating piston.I have also indicated a guide-rod 8 for the valve and valve-seatingspring, which extends inwardly from the inner side of the piston andpasses loosely through the opening in the stem 2", being in turn looselyfitted by the valve 6. By combining with this rod a nut 9, as shown, thepiston is not only prevented from moving out of the cylinder altogether,but by adjusting the nut on the rod provision exists for varying theliquid-space of the cylinder, and hence the quantity that can bedischarged from the vessel at each inward movement of the piston.

The discharge-nozzle is designated by 10 and in the particularorganization illustrated is shown mounted on the movable piston. Thisnozzle is of suitable form, and the passage therethrough is controlledby an outwardly-opening valve 11, urged against its seat by a spring 12,exerting a closing pressure on the valve light enough to readily yieldupon the forcible inward movement of the piston and permit the outflowof theliquid.

, Instead of a construction in which the piston is the movable elementof the discharging device I may reverse the relation and thermore, thedischarging device is located within the containing vessel, a movablecylinder 2 being fitted to slide over the piston,

. while an interposed spring 4 serves to eleport 3 in the piston.

vate the cylinder when released from the pres sure of the finger, andthereupon draw in liquid from the containing vessel through a A valve 6in this port prevents the return of the liquid in the cylinder to thevessel, gravity in this instance tending to seat the valve, while a bentportion 6" of the stem 6" thereof prevents the displacement of thevalve. An operatingstem 5, to one end of which the cylinder is attachedand which extends upwardly, carrying at its upper end the push-button orknob'5, enables the cylinder to be forced downwardly against the tensionof the spring 4:, expelling the liquid outwardly through the passage 3in the piston-stem past an outwardly-opening valve 11' similar to thevalve 11 and the seating of which when not under a pressure applied tothe liquid in the cylinder is assured by a spring 12'. In theconstruction illustrated the nozzle(designated by 10) is utilized as aclam ping-nut for engaging an annular shoulder 3 on the piston-stem 3with the inner face of the bottom of the vessel, thereby firmly holdingthe piston in place.

If the operating-stem 5 is threaded to engage with the push-button orknob 5 and the latter is provided with a shoulder 5", adapted to engagewith the under face of the cover I), by screwing the button up or downthe position of the cylinder relatively to the piston may be adjusted,and hence such a construction serves to vary the amount of liquiddischarged at each operation of the device.

When employed to discharge from time to time portions of the vesselscontents, an inward thrust of the operating-button serves to force theliquid in the cylinder through the discharge-passage and past theoutwardlyopening valve. Upon its release the movable cylinder or piston,as the case may be, being moved back to its normal position by thespring tends to eft'ect-uallyclose such valve and by opening theinwardly-opening valve to draw liquid into the cylinder.

The employment of a spring for returning the movable element of thedischarging device is of especial advantage, since it automatically, asit were, returns the parts after operation, during which return thecylinder is filled afresh from the containing vessel. Thereafter asingle inward thrust by the operator is all that is necessary at anytime to obtain aquantity of the preparation from the vessel.

Having described my invention, I claim- 1. In a dispensing apparatus,the combination of a liquid-reservoir, a piston and a cylinder, one ofwhich members is reduced in diameter to form a perforated projectionextending through an opening in the reservoir, a clamping-nut engagingwith the said reduced projection, and securing the projection-providedmember to the reservoir, an operating-rod extending from the othermember, a push-button for actuating the operating-rod. an adjustable nutfor regulating the throw of the rod, a spring for returning afteractuation the member from. which the operatingrod extends and valves inthe inlet and outlet passages of the reservoir.

2. In a dispensing apparatus, the combination of a liquid-reservoir,straps inclosin g the reservoir and serving to fasten it fixedly inposition, a piston and a cylinder, one of which members is reduced indiameter to form a perforated projection extending through an opening inthe reservoir, a clamping-nut engaging with the said reduced projection,and securing the projection-provided member to the reservoir, anoperating-rod extending from the other member, a push-button foractuating the operating-rod, an adjustable nut for regulating the throwof the rod, a spring for returning after actuation the member from whichthe operating-rod extends, and valves in the inlet and outlet passagesof the reservoir.

3. In a dispensing apparatus, the combina tion of a liquid-reservoir, apiston having a perforated projection extending through an opening inthe reservoir, a clamping-nut engaging with said projection and fixedlysee curing the piston to the reservoir, a cylinder slidably fitted tothe piston, an inclosed returning-spring interposed between the end faceof the cylinder and the opposed face of the piston, an operating-rodattached to the cylinder, at push-button adjustably connected to theoperating-rod and accessible from the exterior of the reservoir, a stopfor limiting the movement of the operating-rod under the action of thespring, and valves in the inlet and outlet passages of the cylinder.

In a dispensing apparatus, the combination ofa liquid-reservoir, strapsinclosing the reservoir and serving to fasten it fixedly in position, apiston having aperforated projection extending through an opening inthereservoir, a clamping-nut engaging with said projection and fixedlysecuring the piston to the reservoir, a cylinder slidably fitted to thepiston, an inclosed returning-spring inter-. posed between the end faceof the cylinder and the opposed face of the piston, an operating-rodattached to the. cylinder, a pushtion of a liquid-reservoir,strapsinclosing A the reservoir and serving to fasten it fixedly in position,a piston having a perforated projection extending through an opening inthe reservoir, a clamping-nut constituting a delivery-nozzle andengaging with said projecv tion to fixedly secure the piston to thereservoir, a cylinder slidably fitted to the piston, an inclosedreturning-spring interposed between the end face of the cylinder and theopposed face of the piston, an operating-rod attached to the cylinder, apush-button adj ustably connected to the operating-rod and accessiblefrom the exterior of the reservoir, a stop for limiting the movement ofthe operating-rod under the action of the spring, and valves in theinlet and outlet passages of the cylinder.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

DAYVE BORIS DE WALTOFF.

Witnesses:

HARRY HERTZBERG, GEORGE HARRIS.

